It is pretty incredible that a hardware hacker was somehow able to get an NES controller to work on a Nintendo DS.  Anyone using this hacked device could use the Nintendo DS to play classic games like Super Mario Brothers 1 using the stitched-in NES controller.

On the forum, acidmods.com, it was revealed the the alias of the person that put this together is thecauseandeffect.  He used to own over 600 NES cartridges, but sold them because he has every rom on the DS.  But he learned that he preferred the original controller.

[via Hack-A-Day]